A few years back, in-flight Wi-Fi was something maybe available to the President of the United States. Now it's on every airline, but not quite every plane. Which airlines are most likely to give you the option?

The ReadWrite site has done the good work of rounding up all the published reports of flights with Gogo in-flight Wi-Fi, sorted by airline. The numbers are always improving, but some airlines annoyingly report only the types of planes which have in-flight Wi-Fi. For those of us who don't study amateur aviation just to know if we can email our boss mid-flight, Hipmunk does a good job of reporting which flight plans likely involve Wi-Fi.